EP0284591B1 - Method for separating a broken warp thread at the warp stop motion from the warp sheet on a weaving machine, and a device which uses this method - Google Patents
Method for separating a broken warp thread at the warp stop motion from the warp sheet on a weaving machine, and a device which uses this method Download PDFInfo
- Publication number
- EP0284591B1 EP0284591B1 EP88870044A EP88870044A EP0284591B1 EP 0284591 B1 EP0284591 B1 EP 0284591B1 EP 88870044 A EP88870044 A EP 88870044A EP 88870044 A EP88870044 A EP 88870044A EP 0284591 B1 EP0284591 B1 EP 0284591B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- warp
- characteristic
- nozzles
- fallen
- suction nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 43
- 238000009941 weaving Methods 0.000 title claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000007723 transport mechanism Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000002250 progressing effect Effects 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 6
- 230000009849 deactivation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J1/00—Auxiliary apparatus combined with or associated with looms
- D03J1/004—Detection and repair of broken warp yarns
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/18—Automatic stop motions
- D03D51/20—Warp stop motions
Definitions
- This invention concerns a method for separating a broken warp thread at the warp stop motion from the warp sheet on a weaving machine _ in particular on weaving machines of the type in which the warp stop motion consists of one or more rows of drop wires _ in order to enable the broken warp thread to be automatically located and taken up.
- the invention also concerns a device which uses this method.
- a warp stop motion commonly used on weaving machines consists of a row of drop wires resting on the warp threads, so that when a warp thread break occurs, the corresponding drop wire makes an electrical contact or mechanical interlock, thus causing the machine to be stopped.
- Dutch patent application No. 8600372 _ made by the present applicant _ describes a method of automatically locating the fallen drop wire, which is then gripped and raised in order to make it visibly stand out from the row of drop wires, thus enabling the weaver to see at a glance where a thread break needs to be repaired.
- Dutch patent application No. 8601819 also describes a method for turning the fallen drop wire through an angle so that the neighboring drop wires are forced apart, thus forming a local opening in the unbroken warp threads, and so facilitating rethreading of the drop wire which is presented in this way.
- the present invention concerns a method for separating the broken warp thread at the warp stop motion from the warp sheet on a weaving machine, thus providing a solution to the problem described below. Further, the warp thread which is thus separated is also brought into the correct position with respect to the remaining warp threads, in other words not crossed over the neighboring threads.
- the method of the invention essentially involves extracting the sagging loop _ formed in the broken warp thread as a result of the drop wire falling _ from the warp stop motion, back from the fallen drop wire; optionally, the fallen drop wire may first be raised before extracting the broken warp thread in this way.
- the loop is extracted from the warp stop motion back from the fallen drop wire by means of at least one airstream which exerts a force on the broken warp thread, starting at the point where the fallen (or raised) drop wire is located.
- the airstream may be provided by suction or blower nozzles.
- the force is exerted by mechanical means, for example grippers or hooks.
- the method according to the present invention should preferably be used in combination with the method described in Dutch patent application No. 8601819, in which as well as being raised the fallen drop wire is also turned through an angle in order to facilitate the freeing of the broken warp thread.
- the effect of turning the drop wire in this way is to draw the neighboring warp threads away from the broken warp thread.
- the present invention also concerns a device for applying the method of the invention, which essentially uses one or more suction nozzles, blower nozzles or mechanical means which operate in conjunction with the drop wire.
- Fig. 1 shows a cross section of a warp stop motion consisting essentially of a number of rows of drop wires 1 to 4 which are suspended on the warp threads of the warp sheet 5, and which when they fall make an electrical contact with one the electrodes 6 to 9 respectively.
- the warp sheet 5 is led over supporting elements 10 to 14 on either side of the rows of drop wires 1 to 4.
- a broken warp thread 15 is shown such that the corresponding drop wire 16 has fallen. Also in fig. 1 there is a gripping device 17, more particularly as described in Dutch patent application No. 8601819, which manipulates the fallen drop wire 16.
- the actual mechanism of the invention consists, in the embodiment illustrated, of a series of suction nozzles 18 to 21 which can move in such a way that each suction nozzle 18 to 21 can be presented opposite one of a particular row of drop wires 1 to 4.
- the operation of the device according to the invention, using the method outlined above, is described below with the aid of the successive figures.
- the fallen drop wire 16 is gripped by its end 23, turned and raised by gripping device 17, as shown in fig. 2.
- the suction nozzles 18 to 21 are lowered towards the warp sheet 5, almost right up to the supporting elements 11 to 14, as shown in fig. 3.
- the result of raising the fallen drop wire 16 will be that where previously there was a sag 22 in the warp thread 15 there will now be a free-hanging loop 24.
- the suction nozzle 19 is activated, with the result that the warp thread 15 is drawn taut and perhaps also partly sucked in.
- the suction nozzles 18 to 21 are now moved upwards, with the result that said loop 24 is displaced over a short distance, arriving over the supporting element 12, since the suction nozzle 19 drags the warp thread 15 towards it.
- suction nozzle 19 When the nozzles arrive in their highest position, suction nozzle 19 is deactivated and suction nozzle 20 is activated (the activation and deactivation times may overlap slightly).
- the series of suction nozzles is once more presented to the warp sheet 5, resulting in a situation as shown in fig. 5.
- the warp thread 15 is then moved along by the action of suction nozzle 20, so that the loop is farther displaced to nozzle 20, as shown in fig. 6.
- a hooking or gripping mechanism 25 may be positioned in proximity to the last suction nozzle 21 in order to take over the warp thread 15 from the suction nozzle 21, so that the latter may be deactivated. Said hooking or gripping mechanism 25 may then be used for further manipulation of the warp thread 15; however such manipulation is outwith the scope of this invention.
- suction nozzle which is first lowered beside the fallen drop wire 16, then activated and raised so as to draw the loop 24 with it, and subsequently deactivated and positioned over the following row of drop wires. This sequence is repeated until the suction nozzle arrives outside the warp stop motion, at which point the abovementioned hooking or gripping mechanism 25 can take over the thread.
- the device in addition to the suction nozzles, the device must include the necessary transport, activation, deactivation and control functions necessary for the cycle to be carried out automatically.
- the loop 24 can of course be carried either to side 26 or side 27 of the warp stop motion; in the latter case, there must be another suction nozzle 28 at the other side 27 of the warp stop motion.
- the operating cycle of the suction nozzles 18 to 21 is as follows. When a warp break is detected, all the suction nozzles 18 to 21 are lowered. The suction nozzle nearest the fallen drop wire 16 is activated and raised so that the broken warp thread 15 is raised with it; in the accompanying figures, the suction nozzles concerned would be nozzle 19. When the suction nozzle 19 arrives in its raised position, it is deactivated and the next suction nozzle 20, which is still in the lowered position, is activated and then raised. This process is repeated in a similar way until the loop 24 has been carried out of the warp stop motion.
- suction nozzles are then activated and deactivated successively, so that the loop 24 is passed from one to the other until it arrives outside the warp stop motion, either on side 26 or on side 27, in other words going directly from the stage shown in fig. 4 to the stage shown in fig. 6, without moving the suction nozzles up and down.
- a warp thread which gets stuck in a nozzle can also be freed by some mechanical device, eg. rings or tubes 29 mounted concentrically on the suction nozzles 18 to 21 and which move up and down.
- suction nozzles 18 to 21, and also nozzle 28 if provided, can also be mounted underneath the warp sheet 5 instead of above it.
- the method of the invention is accomplished by using a succession of airjets at various points to displace the loop 24 in the broken warp thread 15, starting at the fallen drop wire 16 and progressing to one of the sides of the warp stop motion, in this case side 26.
- the suction nozzles 18 to 21, and nozzle 28 if provided, are replaced to blower nozzles 30 to 34. No up and down motion is necessary if such blower nozzles are used.
- the operation of the device may be simply deduced from fig. 10, and is more or less analagous to the method using suction nozzles.
- extraction tubes 35 to 39 mounted opposite the blower nozzles 30 to 34, in order to promote evacuation of the airstream from whichever blower nozzles are activated.
- the extraction tubes may also operate as suction nozzles, so that there is a combined action of blower and suction nozzles.
- blower nozzles 30 to 33, and also blower nozzle 34 if provided, are mounted underneath the warp sheet 5. This has the advantage that they can be mounted on the same transport mechanism as the rotatable gripper device 17.
- the loop 24 can also be transported out of the warp stop motion by means of hooking or gripping devices.
- the suction nozzles are replaced by hooks 42 to 45, and also hook 46 if provided, which move up and down, thus raising the loop 24, starting at the fallen drop wire 16.
- the particularity of this method is that, as shown in the two figures, it is not necessary for the fallen drop wire 16 to be presented and raised by a special gripping device 17, since the corresponding drop wire will be raised by the action of gripper 43 in fig. 13.
- the motion of the hooks must of course be controlled in such a way that they operate separately one after the other so that they carry the loop 24 in the warp thread 15 with them. In order to avoid unwanted effects on the loop 24, it is also possible for a guide 47 for the broken warp thread to be lowered.
- suitably controlled gripping or clamping devices may be used instead of the hooks 42 to 45.
- the hooking, gripping or clamping devices may of course also be mounted under the warp sheet 5.
- the suction nozzles 18 to 21 or the suction nozzle 28 may be provided with a sieve-shaped element 48 which prevents the broken warp thread 15 being sucked completely into the suction nozzles 18 to 21 or 28.
- the extraction tubes 35 to 39 may also be provided with a sieve-shaped element 48 which prevents the broken warp thread 15 being blown completely into the extraction tubes 35 to 39.
- the sieve-shaped element 48 may be provided with holes 49 whereby the diamter of the holes 49 is less than the diameter of the warp thead 15 in order to prevent the warp thread being sucked into the holes 49.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
- Treatment Of Fiber Materials (AREA)
- Looms (AREA)
Description
- This invention concerns a method for separating a broken warp thread at the warp stop motion from the warp sheet on a weaving machine _ in particular on weaving machines of the type in which the warp stop motion consists of one or more rows of drop wires _ in order to enable the broken warp thread to be automatically located and taken up. The invention also concerns a device which uses this method.
- A warp stop motion commonly used on weaving machines consists of a row of drop wires resting on the warp threads, so that when a warp thread break occurs, the corresponding drop wire makes an electrical contact or mechanical interlock, thus causing the machine to be stopped.
- Dutch patent application No. 8600372 _ made by the present applicant _ describes a method of automatically locating the fallen drop wire, which is then gripped and raised in order to make it visibly stand out from the row of drop wires, thus enabling the weaver to see at a glance where a thread break needs to be repaired. Dutch patent application No. 8601819 also describes a method for turning the fallen drop wire through an angle so that the neighboring drop wires are forced apart, thus forming a local opening in the unbroken warp threads, and so facilitating rethreading of the drop wire which is presented in this way.
- Although both of the abovementioned patent applications are aimed at automating the process of warp thread repair, they do not offer any solution to the problem of dealing with the broken warp thread, which is usually still threaded through the fallen drop wire, either by removing it and replacing it with a new one or by tying it in again. The problem is mainly that the broken warp thread which remains threaded through the fallen drop wire first has to be located, which is fairly difficult to automate since the warp thread which was under tension contracts when it breaks and gets crossed over neihboring threads.
- The present invention concerns a method for separating the broken warp thread at the warp stop motion from the warp sheet on a weaving machine, thus providing a solution to the problem described below. Further, the warp thread which is thus separated is also brought into the correct position with respect to the remaining warp threads, in other words not crossed over the neighboring threads.
- To this end, the method of the invention essentially involves extracting the sagging loop _ formed in the broken warp thread as a result of the drop wire falling _ from the warp stop motion, back from the fallen drop wire; optionally, the fallen drop wire may first be raised before extracting the broken warp thread in this way.
- In a preferred embodiment the loop is extracted from the warp stop motion back from the fallen drop wire by means of at least one airstream which exerts a force on the broken warp thread, starting at the point where the fallen (or raised) drop wire is located. Depending on the variant, the airstream may be provided by suction or blower nozzles.
- In yet another embodiment, the force is exerted by mechanical means, for example grippers or hooks.
- The method according to the present invention should preferably be used in combination with the method described in Dutch patent application No. 8601819, in which as well as being raised the fallen drop wire is also turned through an angle in order to facilitate the freeing of the broken warp thread. The effect of turning the drop wire in this way is to draw the neighboring warp threads away from the broken warp thread.
- The present invention also concerns a device for applying the method of the invention, which essentially uses one or more suction nozzles, blower nozzles or mechanical means which operate in conjunction with the drop wire.
- For the purpose of describing the characteristics of the invention, the following preferred embodiments are described with reference to the accompanying drawings, by way of example only and without being limitative in any way, where:
- fig. 1 represents a cross section of a warp stop motion, equipped with suction nozzles, at the point of the broken warp thread;
- figs. 2 to 8 illustrate the operation of the device; fig. 2 is a plan view (looking down on the warp sheet) and figs. 3 to 8 show the various stages of the method, in a cross section of the warp stop motion;
- fig. 9 shows a particular embodiment of a suction nozzle, such as may be used in the device according to the invention;
- fig. 10 shows a device which uses blower nozzles mounted above the warp sheet;
- fig. 11 shows a variant of the embodiment in fig. 10, in which the blower nozzles are mounted under the warp sheet;
- figs. 12 and 13 show yet another variant which uses a hook to move the sagging loop.
- figs. 14 and 15 show a particular embodiment of a suction nozzle or extraction tube.
- Fig. 1 shows a cross section of a warp stop motion consisting essentially of a number of rows of
drop wires 1 to 4 which are suspended on the warp threads of thewarp sheet 5, and which when they fall make an electrical contact with one theelectrodes 6 to 9 respectively. Thewarp sheet 5 is led over supportingelements 10 to 14 on either side of the rows ofdrop wires 1 to 4. - In fig. 1 a
broken warp thread 15 is shown such that thecorresponding drop wire 16 has fallen. Also in fig. 1 there is agripping device 17, more particularly as described in Dutch patent application No. 8601819, which manipulates thefallen drop wire 16. - The actual mechanism of the invention consists, in the embodiment illustrated, of a series of
suction nozzles 18 to 21 which can move in such a way that eachsuction nozzle 18 to 21 can be presented opposite one of a particular row ofdrop wires 1 to 4. The operation of the device according to the invention, using the method outlined above, is described below with the aid of the successive figures. - In fig. 1 a warp thread break has occurred, in particular in
warp thread 15. Here it should be noted that as a result of thedrop wire 16 falling asag 22 has been formed in thewarp thread 15. Thefallen drop wire 16 is located and gripped by thegripping device 17. - In the next step, the
fallen drop wire 16 is gripped by itsend 23, turned and raised bygripping device 17, as shown in fig. 2. At the same time thesuction nozzles 18 to 21 are lowered towards thewarp sheet 5, almost right up to the supportingelements 11 to 14, as shown in fig. 3. - Obviously, the result of raising the
fallen drop wire 16 will be that where previously there was asag 22 in thewarp thread 15 there will now be a free-hangingloop 24. At this stage, shown in fig. 2, thesuction nozzle 19 is activated, with the result that thewarp thread 15 is drawn taut and perhaps also partly sucked in. As shown in fig. 4, thesuction nozzles 18 to 21 are now moved upwards, with the result that saidloop 24 is displaced over a short distance, arriving over the supportingelement 12, since thesuction nozzle 19 drags thewarp thread 15 towards it. - When the nozzles arrive in their highest position,
suction nozzle 19 is deactivated andsuction nozzle 20 is activated (the activation and deactivation times may overlap slightly). The series of suction nozzles is once more presented to thewarp sheet 5, resulting in a situation as shown in fig. 5. Thewarp thread 15 is then moved along by the action ofsuction nozzle 20, so that the loop is farther displaced tonozzle 20, as shown in fig. 6. - As shown in figs 7 and 8, the above sequence is then be repeated for the
last suction nozzle 21, so that theloop 24 is drawn out of the warp stop motion, away from thefallen drop wire 16. A hooking orgripping mechanism 25 may be positioned in proximity to thelast suction nozzle 21 in order to take over thewarp thread 15 from thesuction nozzle 21, so that the latter may be deactivated. Said hooking or grippingmechanism 25 may then be used for further manipulation of thewarp thread 15; however such manipulation is outwith the scope of this invention. - On commencement of the operation according to the method of the invention, it may be advantageous to first activate the
nozzle 18 beside thefallen drop wire 16, this is opposite to the direction in which theloop 24 will be transported, in order to raise thewarp thread 15 and so facilitate the transfer of saidloop 24 between theother suction nozzles 19 to 21. - Clearly, other variations of the method according to the invention are also possible. In one important variant, there is only one suction nozzle, which is first lowered beside the
fallen drop wire 16, then activated and raised so as to draw theloop 24 with it, and subsequently deactivated and positioned over the following row of drop wires. This sequence is repeated until the suction nozzle arrives outside the warp stop motion, at which point the abovementioned hooking orgripping mechanism 25 can take over the thread. - It also clear that in addition to the suction nozzles, the device must include the necessary transport, activation, deactivation and control functions necessary for the cycle to be carried out automatically.
- The
loop 24 can of course be carried either toside 26 orside 27 of the warp stop motion; in the latter case, there must be anothersuction nozzle 28 at theother side 27 of the warp stop motion. - In a variant, the operating cycle of the
suction nozzles 18 to 21 is as follows. When a warp break is detected, all thesuction nozzles 18 to 21 are lowered. The suction nozzle nearest thefallen drop wire 16 is activated and raised so that thebroken warp thread 15 is raised with it; in the accompanying figures, the suction nozzles concerned would benozzle 19. When thesuction nozzle 19 arrives in its raised position, it is deactivated and thenext suction nozzle 20, which is still in the lowered position, is activated and then raised. This process is repeated in a similar way until theloop 24 has been carried out of the warp stop motion. - In yet another operating cycle which may be used in the method according to the invention, only the
suction nozzle 19 is lowered towards thefallen drop wire 16 and then raised, taking thebroken warp thread 15 with it when it is raised. - The other suction nozzles are then activated and deactivated successively, so that the
loop 24 is passed from one to the other until it arrives outside the warp stop motion, either onside 26 or onside 27, in other words going directly from the stage shown in fig. 4 to the stage shown in fig. 6, without moving the suction nozzles up and down. - In order to prevent the
warp thread 15 remaining stuck inside a suction nozzle after it has been deactivated, due to the stiffness of the thread, thus preventing theloop 24 being passed from one to the other, positive pressure can be applied to the first nozzle when one nozzle is deactivated and the next activated, thus making sure that theloop 24 is released. A warp thread which gets stuck in a nozzle can also be freed by some mechanical device, eg. rings or tubes 29 mounted concentrically on thesuction nozzles 18 to 21 and which move up and down. - The
suction nozzles 18 to 21, and alsonozzle 28 if provided, can also be mounted underneath thewarp sheet 5 instead of above it. - In the variant shown in fig. 10, the method of the invention is accomplished by using a succession of airjets at various points to displace the
loop 24 in thebroken warp thread 15, starting at thefallen drop wire 16 and progressing to one of the sides of the warp stop motion, in thiscase side 26. To this end thesuction nozzles 18 to 21, andnozzle 28 if provided, are replaced toblower nozzles 30 to 34. No up and down motion is necessary if such blower nozzles are used. The operation of the device may be simply deduced from fig. 10, and is more or less analagous to the method using suction nozzles. - It is possible to provide
extraction tubes 35 to 39 mounted opposite theblower nozzles 30 to 34, in order to promote evacuation of the airstream from whichever blower nozzles are activated. The extraction tubes may also operate as suction nozzles, so that there is a combined action of blower and suction nozzles. - In the variant shown in fig. 11, the
blower nozzles 30 to 33, and alsoblower nozzle 34 if provided, are mounted underneath thewarp sheet 5. This has the advantage that they can be mounted on the same transport mechanism as therotatable gripper device 17. - As shown in figs. 12 and 13, the
loop 24 can also be transported out of the warp stop motion by means of hooking or gripping devices. In the variant illustrated, the suction nozzles are replaced byhooks 42 to 45, and also hook 46 if provided, which move up and down, thus raising theloop 24, starting at the fallendrop wire 16. The particularity of this method is that, as shown in the two figures, it is not necessary for the fallendrop wire 16 to be presented and raised by a specialgripping device 17, since the corresponding drop wire will be raised by the action ofgripper 43 in fig. 13. - The motion of the hooks must of course be controlled in such a way that they operate separately one after the other so that they carry the
loop 24 in thewarp thread 15 with them. In order to avoid unwanted effects on theloop 24, it is also possible for a guide 47 for the broken warp thread to be lowered. Clearly, suitably controlled gripping or clamping devices may be used instead of thehooks 42 to 45. The hooking, gripping or clamping devices may of course also be mounted under thewarp sheet 5. - In a preferred embodiment as shown in fig. 14 the
suction nozzles 18 to 21 or thesuction nozzle 28 may be provided with a sieve-shapedelement 48 which prevents the brokenwarp thread 15 being sucked completely into thesuction nozzles 18 to 21 or 28. In the same way theextraction tubes 35 to 39 may also be provided with a sieve-shapedelement 48 which prevents the brokenwarp thread 15 being blown completely into theextraction tubes 35 to 39. - As shown in fig. 15 the sieve-shaped
element 48 may be provided withholes 49 whereby the diamter of theholes 49 is less than the diameter of the warp thead 15 in order to prevent the warp thread being sucked into theholes 49. - The present invention is no way limited to the variants described by way of example and shown in the accompanying figures; on the contrary, such a method and device for extracting a broken warp thread from the warp sheet in weaving machines may be made in all sorts of variants while still remaining within the scope of the invention.
Claims (28)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE8700254A BE1000376A4 (en) | 1987-03-13 | 1987-03-13 | METHOD FOR CHAIN GUARD HEIGHT isolate a BROKEN CHAIN WIRE FROM THE CHAIN in a weaving machine, AND DEVICE APPLYING THIS PROCESS. |
BE8700254 | 1987-03-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0284591A1 EP0284591A1 (en) | 1988-09-28 |
EP0284591B1 true EP0284591B1 (en) | 1991-05-29 |
Family
ID=3882562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88870044A Expired EP0284591B1 (en) | 1987-03-13 | 1988-03-10 | Method for separating a broken warp thread at the warp stop motion from the warp sheet on a weaving machine, and a device which uses this method |
Country Status (4)
Country | Link |
---|---|
US (2) | US4905737A (en) |
EP (1) | EP0284591B1 (en) |
BE (1) | BE1000376A4 (en) |
DE (1) | DE3862976D1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2223511B (en) * | 1988-10-10 | 1992-08-26 | Texipat S A | Apparatus and method for automatically repairing broken warp threads in weaving machines or looms |
EP0381143B1 (en) * | 1989-02-02 | 1996-05-29 | Tsudakoma Corporation | Method of automatically mending warp yarn and a device for carrying out the same |
EP0421924B1 (en) * | 1989-10-03 | 1994-06-08 | Sulzer RàTi Ag | Process and device to repair warp defects in a loom |
JPH06104946B2 (en) * | 1989-10-11 | 1994-12-21 | シーケーディ株式会社 | Dropper separation device |
DE69115319T2 (en) * | 1990-03-28 | 1996-05-02 | Tsudakoma Ind Co Ltd | Process for localizing the gap corresponding to a broken warp thread in a reed and locating or pulling device |
KR930004078B1 (en) * | 1990-03-28 | 1993-05-20 | 쯔다고마 고오교오 가부시끼가이샤 | Method of restoring a broken warp after mending the same |
JP2832857B2 (en) * | 1990-04-19 | 1998-12-09 | 津田駒工業株式会社 | Warp yarn repair control method and device |
BE1004740A3 (en) * | 1991-04-09 | 1993-01-19 | Picanol Nv | METHOD AND DEVICE FOR THE ISOLATION OF WIRE END OF A BROKEN CHAIN WIRE FROM THE CHAIN in a weaving machine. |
US7819142B2 (en) * | 2005-11-21 | 2010-10-26 | Picanol N.V. | Method for introducing a weft thread in an air weaving machine and air weaving machine |
EP2570530B1 (en) * | 2011-09-14 | 2014-01-01 | Starlinger & Co Gesellschaft m.b.H. | Warp stop motion detector and circular loom |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL68526C (en) * | ||||
FR1467135A (en) * | 1965-12-13 | 1967-01-27 | Cotonniere De Fives | Advanced electric chain breaker for looms |
DE2902003C2 (en) * | 1979-01-19 | 1986-08-28 | W. Schlafhorst & Co, 4050 Mönchengladbach | Tufting machine with a device for extending the fed sheet of threads |
US4300599A (en) * | 1980-01-04 | 1981-11-17 | Leesona Corporation | Warp detection system |
DE3143484C2 (en) * | 1981-11-03 | 1983-09-29 | Lindauer Dornier Gmbh, 8990 Lindau | Device for separating healds or lamellas |
NL8202215A (en) * | 1982-06-01 | 1984-01-02 | Rueti Te Strake Bv | Rinse-free weaving machine, provided with means for removing faulty weft threads from the weaving box. |
EP0104298B1 (en) * | 1982-09-24 | 1987-04-01 | GebràDer Sulzer Aktiengesellschaft | Device for the logistic operation of textile machines |
JPS609952A (en) * | 1983-06-29 | 1985-01-19 | 株式会社豊田自動織機製作所 | Cut warp yarn treatment in loom |
NL8600372A (en) * | 1986-02-14 | 1987-09-01 | Picanol Nv | DEVICE FOR DETERMINING THE POSITION OF A CHAIN BREAK IN WEAVING MACHINES WITH CHAIN GUARD LAMPS. |
ES2016338B3 (en) * | 1986-07-08 | 1990-11-01 | Picanol Nv | METHOD AND DEVICE TO FACILITATE THE REPAIR OF WARP THREAD IN LOOM FABRICS. |
NL8602192A (en) * | 1986-08-28 | 1988-03-16 | Picanol Nv | METHOD FOR REPAIRING A CHAIN BREAK IN WEAVING MACHINES AND REWIRING DEVICES USED THEREIN |
-
1987
- 1987-03-13 BE BE8700254A patent/BE1000376A4/en not_active IP Right Cessation
-
1988
- 1988-03-10 DE DE8888870044T patent/DE3862976D1/en not_active Expired - Lifetime
- 1988-03-10 EP EP88870044A patent/EP0284591B1/en not_active Expired
- 1988-03-14 US US07/167,906 patent/US4905737A/en not_active Expired - Fee Related
-
1989
- 1989-11-21 US US07/439,871 patent/US4967801A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US4905737A (en) | 1990-03-06 |
BE1000376A4 (en) | 1988-11-16 |
US4967801A (en) | 1990-11-06 |
DE3862976D1 (en) | 1991-07-04 |
EP0284591A1 (en) | 1988-09-28 |
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